Learn from a vibrant community of students and enthusiasts,
including olympiad champions, researchers, and professionals.

Who Killed the Chemist?

One day, a chemist was killed. There are three suspects. His wife Mary, His nephew Nicolas, and has friend Johnathan. There was no evidence of the crime expect for a paper that said
-Nickel
-Carbon
-Oxygen
-Lanthanum
-Sulfur
Who was the killer?